Monster Mash
Sunday, October 18, 2026 · 5:00 PM EDT · Prospect Hill Park · Somerville, MA
HolidayFamily
Tickets and details at somervillema.gov →
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About this event
Get ready for one of Somerville’s favorite Halloween traditions! SomerStreets: Monster Mash transforms Somerville Avenue into a festive Halloween celebration for all ages.
Description from somervillema.gov